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a train travels some distance with a speed of 30km/h and returns with a speed of 45km/h. Calculate the average speed of the train.​

Respuesta :

Answer:

let distance be D km  

total time taken, T (hrs) = D/30 + D/50  

Average speed , V = total distance/ total time = 2D/T = 2/(1/30+1/50) = 37.5 km/hr

Explanation:

Brainly264

Average speed = total distance / total time

= (30+45) km / 2hr

= 75 / 2

= 37.5 km/hr is the average speed of the train.

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